diff --git a/lib/i18n/backend/transliterator.rb b/lib/i18n/backend/transliterator.rb
index 70c0df3d..07ef6d05 100644
--- a/lib/i18n/backend/transliterator.rb
+++ b/lib/i18n/backend/transliterator.rb
@@ -80,7 +80,7 @@ def initialize(rule = nil)
         def transliterate(string, replacement = nil)
           replacement ||= DEFAULT_REPLACEMENT_CHAR
           string.gsub(/[^\x00-\x7f]/u) do |char|
-            approximations[char] || replacement
+            approximations[char] || (replacement == :none ? char : replacement)
           end
         end
 
diff --git a/test/backend/transliterator_test.rb b/test/backend/transliterator_test.rb
index 4c2bc226..8f136861 100644
--- a/test/backend/transliterator_test.rb
+++ b/test/backend/transliterator_test.rb
@@ -56,6 +56,10 @@ def setup
     assert_equal "abc#", @transliterator.transliterate("abcſ", "#")
   end
 
+  test "can keep non-ASCII chars not in map with :none" do
+    assert_equal "abcſ", @transliterator.transliterate("abcſ", :none)
+  end
+
   test "default transliterator raises errors for invalid UTF-8" do
     assert_raises ArgumentError do
       @transliterator.transliterate("a\x92b")